The speed/load characteristics of a universal motor is same as that of?

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asked Mar 20, 2018 by anonymous

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asked May 8, 2018 by anonymous

A 240 V, dc shunt motor draws 15 A while supplying the rated load at a speed of 80 rad/s.

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asked Mar 20, 2018 by anonymous

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asked Jul 20, 2019 by anonymous

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asked May 1, 2018 by anonymous

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asked Mar 20, 2018 by anonymous

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asked Mar 20, 2018 by anonymous

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asked Mar 20, 2018 by anonymous

The speed of a D.C. motor can be controlled by varying

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asked Mar 20, 2018 by anonymous

The speed of a D.C. shunt motor can be increased by?

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asked Apr 28, 2018 by anonymous

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asked Mar 15, 2018 by anonymous

Why the speed of synchronous motor is constant?

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Last answer: An electric motor in which both stator field and rotor rotates with same speed is called synchronous motor.

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asked Mar 20, 2018 by anonymous

Centrifugal switch disconnects the auxiliary winding of the motor at about what percent of synchronous speed?

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asked Mar 20, 2018 by anonymous

If the centrifugal switch does not open at 70 to 80 percent of synchronous speed of motor, it would result in?

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asked Dec 16, 2017 by anonymous

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speed control methods of three phase induction motor?

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asked Mar 20, 2018 by anonymous

Which motor has the poorest speed control?

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asked Mar 20, 2018 by anonymous

In variable speed motor?

Last answer: In variable speed motor a weaker commutating field is needed at low speed than at high speed.

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asked Apr 28, 2018 by anonymous

The effect of increasing load on a synchronous motor running with normal excitation is

The effect of increasing load on a synchronous motor running with normal excitation is (A) Increase both its Ia and power factor. (B) Decrease Ia, but increase power factor. (C) Increase Ia, but decrease power factor (D) Decrease both Ia and power factor.

Last answer: The effect of increasing load on a synchronous motor running with normal excitation is Increase Ia, but decrease power factor

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asked Mar 3, 2018 by anonymous

In synchronous motor, does the winding losses vary with load?

Last answer: No, in the synchronous motor the winding losses do not vary with load.

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asked Mar 20, 2018 by anonymous

The coupling angle or load angle of synchronous motor is defined as the angle between the?

Last answer: The coupling angle or load angle of synchronous motor is defined as the angle between the rotor and the stator poles of opposite polarity.

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136 views 1 answer

asked Mar 20, 2018 by anonymous

If the speed of a D.C. shunt motor is increased, the back e.m.f. of the motor will?

Last answer: If the speed of a D.C. shunt motor is increased, the back e.m.f. of the motor will increase.

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asked Mar 20, 2018 by anonymous

The operating speed of a synchronous motor can be changed to new fixed value by?

Last answer: The operating speed of a synchronous motor can be changed to new fixed value by changing frequency.

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asked Mar 15, 2018 by anonymous

How do you measure the speed of a motor?

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asked Dec 31, 2017 by anonymous

The synchronous speed of an 8 pole induction motor supplied power from a 50 Hz source will be ?

Last answer: Ns equals f/pair pole 50/4 - 12.5

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asked Oct 13, 2019 by anonymous

Speed control of the motor using TRIAC

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asked Mar 18, 2018 by anonymous

If we change the excitation of synchronous machine will it affect on motor speed?

Last answer: No, If we change the excitation of synchronous machine it will not affect on motor speed.

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70 views 1 answer

asked Mar 15, 2018 by anonymous

Which motor has the best speed regulation?

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asked Mar 18, 2018 by anonymous

Synchronous motor always runs at which speed?

Last answer: Synchronous motor always runs at synchronous speed.

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59 views 1 answer

asked Mar 20, 2018 by anonymous

If a D.C. shunt motor is working at full load and if shunt field circuit suddenly opens?

Last answer: If a D.C. shunt motor is working at full load and if shunt field circuit suddenly opens this will make armature to take heavy current, possibly burning it.

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asked Mar 20, 2018 by anonymous

The maximum constant load torque under which a synchronous motor will pull into synchronism...

The maximum constant load torque under which a synchronous motor will pull into synchronism at rated rotor supply voltage and frequency is known as?

Last answer: The maximum constant load torque under which a synchronous motor will pull into synchronism at rated rotor supply voltage and frequency is known as pull-in torque.

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215 views 1 answer

asked Mar 20, 2018 by anonymous

A synchronous motor running with normal excitation adjusts to load increases essentially by increase in?

Last answer: A synchronous motor running with normal excitation adjusts to load increases essentially by increase in armature current.

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asked Mar 18, 2018 by anonymous

In a synchronous motor which losses varies with load?

Last answer: In a synchronous motor, copper losses varies with load.

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asked Mar 18, 2018 by anonymous

If the load of the normally excited synchronous motor is increased the power factor will?

Last answer: If the load of the normally excited synchronous motor is increased the power factor will become lagging.

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anonymous · Answer 1 · 2018-03-20T19:31:21+0000

The speed/load characteristics of a universal motor is same as that of D.C. series motor.

The speed/load characteristics of a universal motor is same as that of?

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